Averaged time course plots of the BOLD response during the low-level baseline condition (fixation).

<p>For several clusters of interest, averaged time course plots illustrate the evolution of the BOLD response, averaged across all 16 participants, during the fixation block (blue line). Relative to the last 3 time points (4.8 s) of the intrinsic alertness task, the averaged time course plots depict the amount of signal change for the complete duration (16 s) of the fixation block. Error bars represent the SEM, averaged across all participants, and the dashed white line marks the end of the fixation block. Time zero always corresponds to the beginning of the fixation block. <i>(ACC = anterior cingulate cortex; DLPFC = dorsolateral prefrontal cortex; IPL = inferior parietal lobule; RH = right hemisphere; LH = left hemisphere)</i>.